Are back end templating engines being used today?

Question

Career in IT

Are built-in engines used in development today to create views, like razor or jinja, or blade? Or are front-end js frameworks used more in conjunction with rest api. If they are used, is it necessary to study them if the goal is only a back-end developer?

Answer 1

In general, APIs won, back and forth JSON, GraphQL, JSON RPC
BUT! Template engines are also actively used
and there are supporters that for many projects the separation is unnecessary in terms of cost and effort (such supporters include the creator of Basecamp/Hey.com, the authors of Ruby on Rails)

Answer 2

Not as an answer/solution, but as an addition - it seems to me that today there are more and more "new static" websites (JAMstack), so template engines (standard or custom) are also used in them.
But if the goal is just study-education, then it’s worth studying at a level a little deeper than hello world, maybe at the level of the first quarter or half of the tutorial. And the rest is just to run your eyes diagonally in order to roughly understand what is there. And when (if) there is a need for more or less complex aspects of this - then delve into it already.